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CAS 88-09-5 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 3983702/03/2011

2-ETHYLBUTYRIC ACID

2-Ethylbutyric Acid

2-ETHYLBUTYRIC ACID is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 88-09-5

CAS 88-09-5PubChem CID 6915

2-Ethylbutyric acid

2-Ethylbutanoic acid is a branched-chain fatty acid. — ChEBI

IUPAC name: 2-ethylbutanoic acid

Molecular formula: C6H12O2
Molecular weight: 116.16 g/mol
Exact mass: 116.083729621 Da
XLogP3: 1.7
Topological polar surface area: 37.3 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Diethylacetic acidButanoic acid, 2-ethyl-3-Pentanecarboxylic acidAcetic acid, diethyl-2-Ethyl butanoic acidButyric acid, 2-ethyl-alpha-Ethylbutyric acidalpha-Ethylbuytyric acid

16 more reported names

Kyselina diethyloctovaFEMA No. 2429.alpha.-Ethylbutyric acidNSC 11765Kyselina diethyloctova [Czech]EINECS 201-796-4IDY8B990KEBRN 1098634AI3-04629NSC-11765DIETHYLACETIC ACID [MI]2-ETHYLBUTYRIC ACID [FCC]2-ETHYLBUTYRIC ACID [FHFI]4-02-00-00950 (Beilstein Handbook Reference)2Ethylbutanoic acid2Ethyl butanoic acid

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:173424
ChEMBL:CHEMBL184290
EPA DTXSID:DTXSID2041418
PubMed:22457771
PubMed:22022302
PubMed:22007198
PubMed:21694848
PubMed:21107976
PubMed:19936111
PubMed:19709219
PubMed:19365576
PubMed:19028504
PubMed:18718131
PubMed:17069659
PubMed:11860136

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for 2-ETHYLBUTYRIC ACID

INCI name

2-ETHYLBUTYRIC ACID

Description

2-Ethylbutyric Acid

Record provenance

Inventory reference: 39837
Imported identity: 2-ETHYLBUTYRIC ACID
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for 2-ETHYLBUTYRIC ACID

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Key data

CAS

88-09-5

201-796-4

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

2-ETHYL-5-METHOXY-BICYCLOHEPTANEPERFUMING

2-ETHYLBUTANOLPERFUMING

2-ETHYLBUTYL CYCLOPENT-1-ENEACETATEPERFUMING

2-ETHYLBUTYL CYCLOPENT-2-ENEACETATEPERFUMING

2-ETHYLIDENEDECANALPERFUMING

2-ETHYLPENTYL-1,3-DIOXOLANEPERFUMING

2-FURANCARBALDEHYDE/HEPTANAL HYDROGENATEDPERFUMING

2-FURFURYLENEOCTANALPERFUMING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How 2-ETHYLBUTYRIC ACID appears in the CosIng inventory

The CosIng inventory lists 2-ETHYLBUTYRIC ACID as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

2-ETHYLBUTYRIC ACID is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

2-ETHYLBUTYRIC ACID is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, 2-ETHYLBUTYRIC ACID carries the following function designation(s):

PERFUMING

CAS 88-09-5 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for 2-ETHYLBUTYRIC ACID

This page reproduces the CosIng inventory entry for 2-ETHYLBUTYRIC ACID from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research 2-ETHYLBUTYRIC ACID and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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